Furnace



UNITED YSTATES PATENT T'OFEICE.

WARD DECKER' AND JOHN P. BELL, OFl OWEGO, NEW YORK.

FU RNAC E.

SPECIFICATION forming part of Letters Patent No. 472,728, dated April12, 1892.

Application filed November 23, 1891. Serial No. 412,819. (No model.) I

To all whom t may concern.-

Be it known that we, VARD DECKER and JOHN P. BELL, citizens of theUnited States, residing at Owego, in the county of Tioga and State ofNew York, haveinvented certain new and useful Improvements in Furnacesand we do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making a part of this specification, and to the letters of referencemarked thereon.

This invention relates to certain new and useful improvements infurnaces and stoves,

` and more particularly to means or devices for moving a trap or damperfor the admission of air as the fuel-door is opened for the admission offuel. We provide means either on or actuated by the door-hinge foractuating the damper or trap from outside of furnace. The form shown iswhat we at present consider the best form for carrying out ourinvention. We provide simple means for adjustment, whereby the trap ordamper may be held open at any required distance for the admission ofmore or less cold air, as may be desired.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be specifically defined by theappended claim.

The invention is clearly illustrated in the accompanying drawings,which, with the letters of reference marked thereon, form a part of thisspecification, and in which- Figure 1 is a front elevation of a portionof a furnace, showing the door and trap or damper and the means foroperating the same. Fig. 2vis a vertical section on the line z z of Fig.l. Fig. 3 is an enlarged perspective view showing the means foradjustment of the trapholding rod. Y

Like letters of reference indicate like parts throughout the severalviews in which they occur.

Referring now to the details of the drawings by letter, A designatesaportion of a furnace or other heating appliance, and B is the fueldoorthereof. This door is hinged at one side-as, for instance, upon thevertical pintles a-and at this side is provided with suitable means, asthe rounded projection b, upon the outer face of which is the cam-lug O,as clearly shown in Figs. l and 2.

D is a trap or damper hinged or pivoted upon horizontal pintles orhinges, so as to move upward in the arc of a circle, as will be readilyunderstood from Fig. 2. If desired, suitable means may be provided foraiding the trap or damper in' its downward movement. Such a provision isseen in Fig. 1, which consists of a pivoted weighted arm E, dependingfrom the rod F, which is connected with the sliding damper G, whichcontrols the aperture c into the interior of the furnace. This latteroontrivance may, however, be omitted.

H is a vertical rod arranged to the rear of the door hinge orspintles,and this rod or sleeve is provided with a notch e, as seen best in Fig.

3, in which the cam-lug on the door is designed to work as the door isswung open, and the contact of the cam-lug in this notch cause's the rodor sleeve to be moved upward vertically. The upper end of this rod orsleeve is bored, as seen at f, and in this .bore is adjustably held arod I, which is also adjustable therein and designed to be held in itsadjusted position by suitable means, as a set-screw g. The lower end ofthe rod or sleeve is provided with a vertical pintle h, which works inan opening in the lug J on the furnace-front, the upper end of the rod Iworking through a similar lug J', as seen in Figs. l and 2, the upperend of the rod engaging the under side of the trap or damper, as seen inFig. 2.

The operation will be apparent. When the fuel-door is opened to feedfuel to the 'furnace, the rod is moved vertically by reason of theengagement of the cam-lug with the notch of the sleeve, and the trap ordamper is opened. As the door is closed the trap or damper graduallyfalls and closes the opening and prevents the admission of cold air. Byadjusting the rod I and holding it in its adjusted position by theset-screw the trap or damper may be made to open more or less, asdesired, or may be so arranged as t0 be kept open more or less at alltimes.

Modifications in detaily .may be resorted to Without departing from thespirit of the invention or sacricing any of its advantages.

What we claim as new is- The combination, with the hinged door withhave'hereunto subscribed out' names in the its rounded proj eetion batits pintle side Workpresence of two, Witnesses. ing between thepintle-lugs and provided with T 'a cam-lug, of the hinged damper, theverti- OITDPDIER 5 cally-movable notched sleeve, and thevertically-adjustable rod carried by said sleeve, as Witnesses: and forthe purposes specified. F. C. HILL,

In testimony that We claim the above We FRED. I-I. ELSTER.

